181436046 has 16 divisors (see below), whose sum is σ = 395860608. Its totient is φ = 54980600.

The previous prime is 181436039. The next prime is 181436051. The reversal of 181436046 is 640634181.

It is a super-2 number, since 2×181436046² = 65838077576228232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 181435998 and 181436016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1374450 + ... + 1374581.

It is an arithmetic number, because the mean of its divisors is an integer number (24741288).

Almost surely, 2^181436046 is an apocalyptic number.

181436046 is an abundant number, since it is smaller than the sum of its proper divisors (214424562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181436046 is a wasteful number, since it uses less digits than its factorization.

181436046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749047.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 181436046 is about 13469.8198206212. The cubic root of 181436046 is about 566.1191652267.

The spelling of 181436046 in words is "one hundred eighty-one million, four hundred thirty-six thousand, forty-six".